2010 Hyundai Sonata Owner's Manual - Page 137
2010 Hyundai Sonata Manual
Page 137 highlights
1 FEATURES OF YOUR HYUNDAI 124 o Use of USB accessories such as a recharger or heater using the USB I/F may lower the performance or cause trouble. o If you use devices such as a USB hub you purchased separately, the vehicle's audio system may not recognize the USB device. Connect the USB device directly to the multimedia terminal of the vehicle.